Magnetic friction-clutch.



PATEN TED APR. 10,

H. A. WILLIAMS. MAGNETIC FRICTION CLUTCH.

APPLICATION FILED MAY 26, 1905.

Wituaaou I u 1 I awe Lung I HARRY A. WILLIAMS, OF AKRONQOHIO, ASSIGNOR TO THE WILLIAMS I ELECTRIC MACHINE COMPANY, OF AKRON, OHIO.

MAGNETIC FRICTION-CLUTCH,

Specification of Letters Patent. Application filed May 26,1906. Serial No. 262,371

Patented April 10, 1906.

Ton/ll whom it may concern:

Be it known that I, HARRY A. WILLIAMS, a citizen of the United States residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Magnetic Friction-Clutches, of which the following is a specification.

This invention relates to improvements in magnetic friction-clutches, and "relates particularly to a mechanical clutch mechanism the friction members of which are operated electrically.

The ob'ect of the invention is the provision of a clutc and operating mechanism therefor located on a shaft, the clutch consisting of but comparatively few elements, being Simle in construction and cheap or inexpensive Afurther object is the provisiomof, a compact durable, and efiicientmechanism applied directly to a shaft for the purposes of such a device, and the compactness of the mechanismrenders the device particularly available for use in a small or limited space.

Asil lustrated, the driving member of the clutchls brought into operative relation with the driven member thereof by electrical connecti'ons; but it will be understood that I may also use other than, electric means for renderin the clutch operative.

he inventlon consists, essentially, of a drivmg member of a clutch rigidly located on a shaft, a driven-member'which may consist of several elements carried loosely on said shaft, an intermediate expansible clutch-operating member, and meansm this instance a magnetic coil-for operatively cpnnectingi the three mentioned members.-

The invention further consists in certain novel features ofiuvention, constructions, and combinations of parts, as hereinafter pointed out.

I have illustrated in the accompanying drawings one example of the hysical emof t e clutch, as will be described. 1

A loose disk 6 is mounted on the shaft ada The shaft 1 may be a line-shaftingor a driving-shaft and may be used in connection with machinery or vehicles'wherever applicable. The shaftl carries rigidly therewith the driving member of the clutch, as a disk 2 which is keyed or otherwise fastened tosai shaft. An enlar ed cup-shaped portion or drum 3 is forme integral with the drivingdisk 2 and incloses the intermediate operative connections of the clutch mechanism. As illustrated, this on or drum is integral with the disk 2; but it will be understood that said portions may be made in pieces and rigidly connected together, if desired, An annular recess 4 is cut out interiorly of the disk 2, and this recess or cavity forms a seat for the coil 5. The magnetic coil 5 is suitably installed in said recess or cavity and a ring-shaped plate 4' is inserted and fastened in a suitable groove or recess 1n the recess air-tight and protecting the col from moisture or oii.

The terminal wires of coil 5 are connected to the commutator rings 5 and 5", to which rings the electric current is transmitted by brushes or rollers in ordinary manner.

the face of a the disk '2, thus inclosing the coil, renderin The driving-disk 2 is provided at its inner face with an annular surface or smoothed face ring 2, and the drum or cup portion 3 of the disk is also provided with a finished interior surface, as 3, these two surfaces being ada ted as friction-surfacesin the. operation jacent the driving or rigid disk 2 and is provided with an elon ated hub 6', between which hub and the s aft may be introduced bushings 7 7 f "A driven pulley 8 is keyed or otherwise secured to the driven disk 6 and rotates therewith. As will be observed in Fig. 1, the driven disk projects within the drum or cup-shaped portion 3 of the driving-disk 2, a recess 3 being provided for that purpose, and the arts thus .form a protection and covering or the operating parts of the clutch mechanism. The bushing 7 projects within the drum or cup 3 and carries thereon'a friction-disk 18, which is free to turn on the bushdrum 3 and is adapted to Q pinll the An elastic or expansible friction-ring 9, preferably a broken ring, is located in the contact with the surface 3 of said cup or drum. This frictionring is rendered operative by the onnection of said ring and the friction-disk 18. These two elements are connected operatively by an expansion-lever 10, which serves to expand the elastic'ring 9, and the expansible ring 9 is fastened to the driven disk 6 by a pin or bolt 11.

Lever 10is provided at one end with a slot 10, into which projects the pin 8 of the friction-disk, and at its other end an enlargement or head 10 is forme'd, which when the parts are assembled is located between the ends of the broken expansible ring 9. A projecting lug 12 is formed on the lever and is adapted to rest on the hub of the magnetic friction disk or plate 8.

' From the foregoing description it Will be understood that the driving member of the clutch carrying the magnetic coil is rigidly secured to the shaft and revolves therewith.

The driven member, consisting of the driven disk, driven pulle expansible ring, expansion -lever, and

mounted on the shaft and do not revolve therewith unless they are in operative conwith the driving member of the nection clutch.

Assuming the driven member of the clutchto be at rest and the driving member rotating,

when it is desired to operate the clutch mechanism' t duced, the coil is energized, and by magnetism draws the friction-disk into contact with \the driving-disk at the surfaces 3 and 8". The friction between these two' surfaces thus 40 generated causes the friction-plate to revolve with the driving-disk. The pin 8 of the friction-plate, located in slot 10. of lever- 10, swings said lever in the direction of the rotation of the driving-diskas, for instancefto the position of the pin shown in dottedlines, Fig. '2. The movement of the lever and its head between the ends of the expansible ring expands said ring against the frictionsurface 3 of the drum, and as said expansible ring-is rigidl fastened to the driven disk by iven disk is revolved, carrying with it the keyed pulley 8.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination of a shaft, a driving memberrigid therewith and a driven member loose thereon, an expansible member carried by'the driven member, adapted to engage the driving member a magnetic coil carried by the driving member, and means operated-by said coil to expand the ex ansible member and engage the members.

carrying a magnetic rymg an expanslble member, a fr1ct1on memiction-plate, are loosely he proper electric current is intro drivmg an driven 1 member and a driven member; an expansible member on the driven member, a frictionmember operatively connected therewith, and electrical connections for engaging said frictional member with thedriving member.

3. In a clutch mechanism, a drivin -disk coil, a driven dis carber operatively connected with the driven disk, and electrical connections for engaging said friction member with the driving-disk.

'4. In a clutch mechanism a driving-disk carrying a magnetic coil, a driven disk car rying an expansible member, a friction member, a lever connecting said expansible member and friction member, and electrical connections for enga ing said friction member with the'drivingisk. I

5. In a clutch mechanism, a driving-disk,

a driven disk carryin an expansible-member, a rotatable mem er adapted to be engaged by the driving-disk to rotate therewith, and means connecting said rotatable member with the expansible member to engag: the latter member with the driving- 9 dis 6. The combination of a driving-disk, a ro- '7 tatable disk adapted to be enga ed by the driving member to rotate therewit adriven disk and an expansible member carried therebyfand a lever connected with the rotatable disk adapted to expandthe expansible member into operative contact with the driven isk. a 7. A drivin -disk having a drum portion, a rotatable dis inclosed therein and adapted to rotate therewith, a driven disk, an eXpansible ring carried thereby and adapted to engage the drum, and a lever connected with the rotatable disk adapted to expand the expansible ring. V a v 8. The combination of a drivin -disk carrying a magnetic coil, a driven dis a pulley rigid therewith, an expansible ring connected with the driven disk, alever, and electrical connections whereby said ring is expanded by said lever.

9. The combination of a driving member carrying a -magnetic coil, a frictiondisk adapted to engage and rotate with said member, a driven member carrying an expansible broken ring, and a lever carried by said fric- I tion-disk having a head located'between the ends of the expansible broken ring. i

10. The combination of a. dI1

adapte ber, adriven member carrying a broken ring,

a pin on the friction-disk, and a slotted lever engaging said pin at one end and having its head between the ends of the broken 11. The combination of a driving mem er,

I g member carrying a magnetic coil, a friction 7 disk to engage and rotate with said mem await pin on the rotatable disk engaging said slotted lever.

12. The combination with a driving memher having a drum ortion, a rotatable disk within said drum a apted to engage and retate with the driving member, a broken ring within the drum and ada ted to engage the interior thereof, a slotted ever having a head in said broken ring, and a pin on the rotatable disk engaging said slotted lever.

13. The comblnation with a drivin membe! carrying a magnetic coil, a drum 'ormed on said member, a friction-disk within the drum adapted to engage and rotate with the driving member, a broken ring within the drum adapted to engage the interior thereof, a slotted lever having a Head in said ring, and a pin on the rotatable disk engaging said. slotted lever,

14. The combination of a driving member having an annular recess therein, a coil in said recess, a late covering the opening to said recess, a riven member, an expansible ring carried'thereby, a friction-plate, and an o erating-lever connecting said plate with t e expansible ring.

In testimony whereof I aflix my signature in presence of two witnesses.

HARRY A. WILLIAMS.

Witnesses WIL IAM T. VAU HAN, EDWIN F. 'Voms. 

